EXTRA COR REST - PJC & ACC Crowns - Porcelain Jacket Crown & All Ceramic Crowns Flashcards
1
Q
what is a PJC?
A
a thin layer of porcelain wrapped around the entirety of the tooth
2
Q
where can PJC be used?
A
e.g. a peg-shaped lateral incisor with low occlusal forces where aesthetics are needed
3
Q
at LDI, what are ACC made out of?
A
lithium disilicate under the trade name E Max
4
Q
2 advantages of ACC.
A
strength
aesthetics
5
Q
2 ways to make ACC
A
- lost wax technique
- chairside using computer aided design/manufacture in the surgery
6
Q
when making ACC, describe the steps when using CAD/CAM
A
- scan
- design
- milling
- finishing, polishing
- crown tried on the model
7
Q
how are CAD/CAM used?
A
- 3D scan the arch of the teeth
- design the restoration
- data is sent to milling machine
- crown is processed and milled from a block
- polished, stained and glazed
